The Sign of the Four

Life & Times

About the Author

Arthur Conan Doyle was born in Edinburgh, Scotland, in 1859, the year Charles Darwin’s The Origin of Species was published. Conan Doyle was raised Catholic but declared himself agnostic by the time he began reading medicine at Edinburgh University, in 1876. He attained his doctorate in 1885, researching a condition caused by syphilis, known as tabes dorsalis, and characterised by the degeneration of sensory neurons causing the body to malfunction.

Conan Doyle’s professional life began with a stint as ship’s doctor on a voyage around the coast of west Africa. In early 1882, before his doctorate was complete, he set up a surgery in Plymouth, England, with a university friend. Unfortunately, their professional relationship was short-lived and Conan Doyle moved to Southsea, England, by that summer. He then established his own medical practice, but found that business was slow, so he worked on his writing, which he had enjoyed from an early age. By 1887, he had published his first Sherlock Holmes novel and steered his career in a different direction.

Between 1887 and 1927, Conan Doyle published nine Sherlock Holmes books: four novels and five collections of short stories. He wrote many other books, but Sherlock Holmes became such an iconic character that his other works were rather overshadowed. In fact, Conan Doyle made the decision to kill off Sherlock Holmes in 1894, in a short story entitled The Final Problem. There was such public outcry at the death of Sherlock Holmes that Conan Doyle was moved to bring him back to life in The Return of Sherlock Holmes.

Despite his agnosticism, Conan Doyle developed an interest in spiritualism, becoming fascinated by beliefs in supernatural phenomena, including the Cottingley Fairy photographs, now understood to be hoaxes. His obsession also created a rift between himself and his friend, escapologist Harry Houdini. Conan Doyle couldn’t accept that Houdini’s escapades were elaborate tricks and Houdini grew vexed at Conan Doyle’s insistence that he possessed magical powers.

Conan Doyle suffered from considerable personal tragedy in the early years of the 20th century. A number of family members died, including his wife Louise, in 1906, and his son Kingsley, in 1918. There was also the horror of World War I to contend with, which affected the entire nation’s morale.

The Influence of Science

One of Conan Doyle’s better-known other works is the science-fiction novel The Lost World, published in 1912. The character Professor Challenger mounts an expedition to the Amazon Basin. He and his entourage encounter all manner of prehistoric animals along the way and witness warfare between an indigenous tribe and ape-men. In context, this novel can be seen as a document of scientific inquiry at the time. The French science-fiction author Jules Verne had died six years before, leaving an anthology of similar stories, including Journey to the Centre of the Earth, 1864. Similarly, Conan Doyle’s contemporary, the English writer H. G. Wells, had published The Time Machine in 1895. These books all enabled the characters to visit other places in time and to witness extinct creatures brought back to life. This general theme proved popular in an era when fossils and the processes of evolution were beginning to be understood by science. Conan Doyle used science to underpin his literature, although it is fair to say that he allowed pseudoscience to also appear towards the end of his life. Sherlock Holmes was Conan Doyle’s expression of his recognition that the application of empirical science and acute intellect were the things that members of the British Empire saw as the reason for their success.

Sherlock Holmes

Arthur Conan Doyle originally invented and wrote about the character of Sherlock Holmes to fill his time during his period as a general practitioner. In 1887 came the first published appearance of Holmes, along with his faithful companion Dr. Watson, in a novel entitled A Study in Scarlet. Then three years after that, in 1890, came his second, The Sign of the Four.

These books established Conan Doyle as a successful author. The Adventures of Sherlock Holmes was published in 1892. Six of the twelve stories are described as ‘adventures’ in their title, because they were originally published singly in the Strand magazine and this provided a sense of continuity to the reader – a type of ‘product branding’. He had devised the detective mystery novel, considered a new genre at the time. Real-life crime cases were not usually very mysterious, but Conan Doyle recognised a need to elaborate for the sake of producing a good read. It is worth noting, however, that the case of the Whitehall Murders and Jack the Ripper had been prevalent in British newspapers in 1888, making the theme of mysterious crime-solving very topical. In fact, many of Conan Doyle’s fans wrote to him, suggesting that Sherlock Holmes attempt to solve the aforementioned crime. However, the author was wise enough to realise that there should be no crossover between fiction and fact, so Holmes was never called upon.

The private detective Sherlock Holmes was, in essence, a hybrid between the Victorian gentleman scientist and the police detective. The Victorian era marked an historical point where science came into its own as a distinct discipline based on empirical experimentation. Before then, science had been rather more ambiguous in its definition. Physicians, chemists and biologists had shown that the world always operates according to strict scientific rules and laws. It was this new phenomenon of scientific certainty that allowed Sherlock Holmes to confidently solve crimes in an age when police investigation was generally understood to be largely a matter of hit and miss, a mix of luck and judgement. Although a fictitious character, Holmes revolutionised the perception of what could be achieved by way of identifying and collecting evidence from crime scenes, theorising motives and courses of events and pinpointing suspects.

It suited the character development better for Holmes to be a private detective, as he evidently possessed a quality of intellectual genius which, so often, is accompanied by idiosyncrasies and eccentricities that make for a personality ill-suited to the routine and regulations of conventional employment.

To make Holmes believable as a character with an exceptional mind, he also needed to be flawed in certain ways, so the author made him something of a loner, with obsessive, fanatical and addictive traits. The result was a well-rounded character that the reader could understand, if not identify with, because he too had vulnerabilities and weaknesses common to us all. In fact, Conan Doyle openly admitted that the greatest part of Holmes was based on someone he knew: Professor Joseph Bell, a Scottish university lecturer and forensic pathologist. Conan Doyle had been impressed by the way Bell had implemented scientific analysis and detailed observation during post-mortem examinations in deducing the cause of death. Although commonplace now, a forensic approach was something quite new in 1877, when they first met.

Conan Doyle commented that Bell’s force of habit, or inculcation, was one of observation, inference and deduction, so that the most likely cause of death was arrived at by a methodical process of elimination. It was a mindset of reason, logic and the application of acquired knowledge; perfect for a successful private investigator. The term Occam’s razor is sometimes applied to Holmes’ method, because it explains things by reducing, or razing, options so that assumptions and conclusions can be made with a reasonable level of accuracy and confidence.

At Sherlock Holmes’ side in all of his investigations is Dr John Watson, who acts as an enthusiastic deputy. He also narrates most of the Sherlock Holmes stories, so that the reader experiences events from a second-person perspective. Dr. Watson is intelligent in his own right, but he admires Holmes for his ability to think about things on a higher plane. It is notable that Holmes has no letters before his name, because he is a free thinker and rejects the notion of establishment and official credentials.

Similarly, Holmes has a rather condescending view of those employed at Scotland Yard, the police headquarters in London. Inspector Lestrade is a Scotland Yard detective for whom Holmes has mixed feelings. On the one hand, he considers Lestrade the best detective on the force, but on the other hand, he seems to only tolerate him because Lestrade is useful and efficient at dealing with the more mundane duties of making arrests and providing manpower.

One notable characteristic of Sherlock Holmes is his penchant for dressing in disguise. Conan Doyle saw that it would be useful for Holmes to be a master of disguise, so that he could access situations without the requirement for assistants who might otherwise do the job for him. In effect, Holmes becomes another character while in disguise, thereby allowing him to glean vital information by stealth. In some ways, this was the forerunner to undercover police work, where detectives are expected to covertly gain the trust of criminals by pretending to be part of the gang or by observing from the sidelines. As a plot device, it was useful for Conan Doyle to have Holmes assume different disguises where necessary, to provide intelligence so that segue between elements of the investigation could be made.

A Study in Scarlet

A Study in Scarlet was the very story that introduced the world to Sherlock Holmes before the character became an institution, and also to Dr. Watson and Inspector Lestrade. The novel went virtually unnoticed upon publication in 1887, but the second novel, The Sign of the Four, put both author and characters on the literary map in 1890.

In order to illustrate Holmes’ powers of observation and deduction, Conan Doyle concocted a rather unlikely and convoluted plot, which set the blueprint for the rest of the Holmes stories – and indeed many similar novels by other crime writers since. Conan Doyle manipulated the fact that many readers seek stories that are imaginative in their scope but realistic in their details, which could explain why the Sherlock Holmes adventures have been such a success and had such an influence.

Conan Doyle had invented a new literary genre by drawing on investigative and scientific developments in the world of policing in the Victorian era. The concept of collecting and interpreting evidence was coming into its own in late nineteenth-century England, and Conan Doyle saw that it offered rich potential for his story-telling. Fanciful storylines could be made convincing to the reader by the interweaving of facts, discoveries and inventions that only Holmes seemed to be privy to, thereby amazing his fellow characters and the reader alike. It was a clever device that caught the reader’s imagination and attention.

The Sign of the Four

Conan Doyle’s second novel featuring Sherlock Holmes, The Sign of the Four (also known as The Sign of Four), was published in 1890 and was the work that first introduced Holmes as a flawed eccentric to the reader. In contrast, Dr. Watson, who meets his future wife in the novel, is shown to be a far more conventional man.

Holmes is painted as a loner who is so dedicated to intellectual pursuits that he fails to make emotional connections. Yet he is not devoid of empathy, perhaps a reason why he is so devoted to solving crimes. He needs Watson by his side, since the doctor has qualities that he lacks.

The Sign of the Four demonstrated Conan Doyle’s ability to write complex yet engrossing plots, a skill that cemented his reputation as a crime novelist. It also referenced the increasingly exotic society of London in the late nineteenth century – the height of the British Empire under the reign of Queen Victoria – which lent his work a contemporary feel at the time. This is often lost on the modern reader, for whom the Sherlock Holmes stories are enjoyed as period literature.

Conan Doyle’s title is well-crafted, enticing the reader without revealing too much. The Sign of the Four indicates conspiracy and intrigue, prompting the reader to ask ‘who are the four?’ and ‘what is meant by the sign?’ Simply by the title alone, the author has engaged his readership before they have even begun.